.eslintrc

{
    "parser": "babel-eslint",
    "extends": "eslint:recommended",
    "parserOptions": {
        "ecmaVersion": 6,
        "sourceType": "module",
        "ecmaFeatures": {},
    },
    "env": {
        "node": true,
        "browser": true
    },
    "rules": {
        "no-console": 0,

        "arrow-parens": [2, "always"],
        "comma-dangle": [2, "never"],
        "eqeqeq": 2,
        "linebreak-style": [2, "unix"],
        "prefer-arrow-callback": 2,
        "semi": [2, "always"],
        "strict": [2, "never"],
        "yoda": [2, "never"],

        "no-alert": 2,
        "no-const-assign": 2,
        "no-else-return": 2,
        "no-this-before-super": 2,
        "no-unexpected-multiline": 2,
        "no-var": 2,
        "no-warning-comments": 1
    }
}